The video below presents the many features of the GamePad in action, including a six-inch screen and gyroscopic movement.
It also highlights the more traditional features of the controller, including analogue sticks, shoulder triggers and face buttons.
The Wii U received a full specs and launch game list at E3 2012, while Nintendo UK said that more features would be announced leading up to launch.
The Wii U will be available worldwide later this year.
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Watch a video of the GamePad from Nintendo's E3 2012 press conference below: